拖拉机空气供给系的维护保养

坚持做好拖拉机空气供给系的维护保养,能够有效防止拖拉机动力性和经济性下降,可以明显地延长发动机的使用寿命。所以应严格按各机型出厂使用说明书对空气滤清器等部位进行维护保养,依据拖拉机作业环境空气质量的好坏,因地制宜地掌控空气滤清器的保养周期,在空气质量较差的情况下,可以适当地缩短保养周期间隔,以保证空气滤清器等零部件经常处在良好的状态下工作。

Design of Control Scheme for Variable Air Volume Air- conditioning System

The air quantity of variable air volume system for the rooms and the total air quantity of the system changes with the change of room load. Combined with the system composition in the laboratory, the paper determines the control scheme of the variable air volume system, that is, indoor temperature-control, indoor positive pressure control, air distribution static pressure control, air-supply temperature control and new air volume control. The dotted lines with arrows mean the output signals from the control unit to actuator, and the solid lines with arrows represent the input signals from the actuator to the control unit.